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Finding the Fourth Proportional to 521,781.40, 781,764.90 and 240,722.20

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Solution

The fourth proportional to 521,781.40, 781,764.90 and 240,722.20 is: 360,664.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,781.40 : 781,764.90 = 240,722.20 : x
  2. Step 2: Convert to fraction form
    521,781.40/781,764.90 = 240,722.20/x
  3. Step 3: Cross multiply
    521,781.40x = 781,764.90 × 240,722.20
  4. Step 4: Simplify right side
    521,781.40x = 188,188,166,610.78
  5. Step 5: Solve for x
    x = 188,188,166,610.78/521,781.40
  6. Step 6: Final answer
    x = 360,664.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.